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2014-11-18T09:24:23+02:00
(a+b):2=51
a=2b
(2b+b):2=51=>3b=51.2=102=>b=102:3=34
(a+34):2=51⇔a+34=102⇒a=102-34=68
a=68
b=34

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2014-11-18T09:48:31+02:00
(a+b):2=51
a=2b
(2b+b):2=51
3b=102
b=102:3=34
a=2b=68
a=68
b=34